On Friday, Arizona Sports 98.7 FM's John Gambadoro confirmed a report originally coming from Fox Sports' Ken Rosenthal that the Arizona Diamondbacks were preparing to sign left-handed pitcher Oliver Perez to a multi-year deal.

Perez, 32, was a free agent coming off back-to-back solid seasons with the Seattle Mariners, for whom he appeared in 94 games between 2012 and 2013. Perez and the Diamondbacks have reportedly agreed to a two-year, $4.25 million contract.

The left-handed reliever has logged a lifetime 4.53 ERA in 300 career appearances. He began his career with the San Diego Padres as a starting pitcher and he remained in that role for the Pittsburgh Pirates and New York Mets until 2012, when he arrived in Seattle.

If signed, the move will come after back-to-back days of general manager Kevin Towers watching his most notable left-handed relief pitchers struggling in Cactus League play. On Thursday, Joe Thatcher allowed a walk, a hit and an earned run in 0.2 inning pitched. And the day before, lefty Joe Paterson surrendered four hits, three earned runs and a home run in an inning of work.

Another Diamondbacks left-hander, Eury De La Rosa, has allowed two hits, three walks, two runs -- one earned run -- in 3.0 innings pitched this spring.

Last season, Thatcher filled the left-handed specialist role in the D-backs bullpen for much of the second half of the season, but struggled, logging a 6.75 ERA in 9.1 innings pitched over 22 appearances. He was acquired along with relief prospect Matt Stites in the trade that sent pitcher Ian Kennedy to the Padres.

Left-handed hitters have a .230 batting average against Perez over the course of his career.